Blackboard



Aug. 17 ,1926. 1,596,457

F R. SCHERER ET AL BLACKBOARD Original Filed 6; 1925 2 Sheets-Sheet 2 Fig.2. F133. 14

Famws Rficum Patented Aug. 17, 1 926. g barren STATES;

1,596,457 PATENT OFFICE.

-FRA1\TCIS R. SCHERER AND JOHN M. TRACY, OF ROCHESTER, NEW YORK.

BLACKBOARD.

Application filed January 6, 1925, Serial No. 884. Renewed February 6. 1928.

The present invention relates to changeable display apparatus or exhibitors and con sists in the combinations and arrangements of elements hereinafter described and particularly set forth in the accompanying claims. p 1

More particularly theinvention pertains to blackboards and has for its purpose to provide a blackboard to meet the requirements of teachers for sufficient. blackboard space in the average schoolroom to the end of displayingthe maximum blackboard surface within a given area, and thereby avoid the necessity for erasing matter already put on the board for the purpose of other dis play when the retention of such matter is desired. r

A further purpose of the invention is to provide a multiple blackboard arrangement embodying a plurality of vertically swinging frames, each having therein a removable blackboard panel, said frames being so arranged that the blackboard on display will be located parallel with the wall whereby the matter written thereon can be observed from all parts of the room thus avoiding blurring or confusion due to reflection of' light rays. I

A. further purpose of the lnvention is to provide a multiple blackboard apparatus having the aforementioned advantages which is of simple construction, easy to manipulate, inexpensive to produce, all to the end that it will commend itself to school authorities for installation in class rooms generally.

The invention is disclosed by way of illustration in the accompanying drawings wherein Figure 1 is a side elevational view of the apparatus. 7

Figure 2 a top plan View thereof showing, in dotted lines, the reversed positions of the blackboard units.

Figure 3 an end elevational view thereof showing the novel hinge construction and arrangement.

Figure 4 a detailed sectional view taken on the line H of Figure 1.

Figure 5 is a similar view on the line 55 of Figure 1.

Figure 6 a View taken on the line 66 of Figure 1; and

Figure 7 a similar View taken on the line 77 of Figure 1.

Referring to the construction in further detail and wherein like reference characters indicate corresponding parts in the different views shown the apparatus consists of a pluraiity of vertically swinging units or sections, preferably four, suitably mounted on a pair of similar brackets 8 adapted to be aflixed to a wall or other supporting structure '(see Figure Each of said brackets is formed with two outstanding lugs 9 apertured to receive the hinge pins or boltslO on which the several hinge arms 11 of the blackboard sections 12 are mounted as shown. The two hinge pins extend for the full length of the bracket and are finished below by suitable securing nuts. Separating the hinges of the frames are stationary plates of bronze 13 which are recessed into the brackets 8 as indicated in Figure 3. And the top-most bracket lug 9 is apertured, as at 14, to receive the staff of the class room flag.

Each blackboard unit or section consists of a rectangular frame 12 of drawn steel tubing or other material the outer corners whereof are united by suitable castings or forgings 15 or other material that are welded or otherwise secured. The several hinging arms 11 are formed integral with the inner frame portion, and are of relatively different lengths whereby each blackboard will occupy a completely reversed position in conformity With its original position as indicated in Figure 2. In this relation the respective hinged arms will be located either outside of the supporting brackets or inside of said supporting brackets accordingly as the blackboard panel is to one side or the other thereof. By this unique hinge construction and arrangement all of the blackboard sections are hinged coaxially and the blackboard surfaces are at all times disposed parallel with the wall thereby avoiding confusion or blurring of the matter written on the board due to reflected light rays.

The upper section of each frame 12 is suitably slot-ted as at 16 (see Figure 6) to receive the blackboard panel 17 that is surfaced on both sides. It will be understood, of course, that said panel may consist of composition material or cork bulletin board, or the like, to be used for display purposes other than for teachers blackboard.

The two side sections of the frame and the bottom length thereof are constructed with channeled members 18 forming ways to receive and securely hold the blackboard panels as shown (see Figures 4 and 7). And suitable cushioning material 19 of felt, or the like, is provided to give the necessary tightness and prevent rattling.

To the end of avoiding knocking or chattering of the frames against each other when the blackboard units are swung each frame section is equipped with a suitable bumper, said bumper per se consists of a spring clip 20 that clamps over the top of each frame as indicated in Figures 1 and 5, Pads of rubber or other suitable material 21 are fitted to each of said clips in the manner shown. Similar bumpers may be located at the bottom or sides.

It will be obvious to those skilled in the art that changes may be made in our device without departing from the spirit of the invention and therefore we do not limit ourselves to the precise construction shown in the drawings and described in the specification but only as indicated in the appended claims.

What is claimed as new is l. A black-board comprising a rectangular tubular frame structure, one section of the frame being slotted for its length; a panel removably fitted to said frame through the slotted portion thereof, a bumper adapted to clamp over the frame section, and pads in said bumper abutting with theedges against the panel.

2. A black-board comprising a rectangular tubular frame structure, one section of the frame being slotted for its length and the other sections being provided with channels on their inner sides; a panel removably fi ted to said frame through the slotted portion thereof and adapted to be held in said channels; a clip fitting over one of said frame sections, and resilient pads carried by the clip in such a manner that the inner ends of the pads abut against the panel and the outer ends project beyond the sides of the frame.

In witness whereof, we have hereunto set our hands and seals at Rochester this 22nd day of December, A. D, nineteen hundred and twenty-four.

FRANCIS R. SCHERER. 

